package com.sky.service.impl;

import com.fasterxml.jackson.databind.util.BeanUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.DishVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Transactional
    public void save(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.insert(setmeal);

        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (setmealDishes != null && setmealDishes.size() > 0) {
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(setmealId);
            });
            setmealDishMapper.insertBatch(setmealDishes);
        }
    }

    /**
     * 分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);

        long total = page.getTotal();
        List<SetmealVO> records = page.getResult();
        return new PageResult(total, records);
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    public void update(SetmealDTO setmealDTO) {
        // 修改基础套餐表
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);

        // 删除套餐和菜品的关联数据
        setmealDishMapper.deleteBySetmealId(setmealDTO.getId());

        // 重新插入套餐和菜品的关联数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if(setmealDishes != null && setmealDishes.size() > 0){
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(setmealDTO.getId());
                setmealDishMapper.insertBatch(setmealDishes);
            });
        }
    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    public SetmealVO getByIdWithSetmeal(Long id) {
        // 查询套餐
        Setmeal setmeal = setmealMapper.getById(id);

        // 查询套餐和菜品的关联数据
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);

        // 封装数据
        SetmealVO setmealVO = new SetmealVO();

        if (setmeal != null){
            BeanUtils.copyProperties(setmeal,setmealVO);
        }
        if (setmealDishes != null && setmealDishes.size()>0){
            setmealVO.setSetmealDishes(setmealDishes);
        }
        return setmealVO;
    }


    /**
     * 起售停售套餐
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        if(status ==StatusConstant.ENABLE){
             List<Dish> dishList = dishMapper.getbySetmealId(id);
             if(dishList!=null&&dishList.size()>0){
                 for (Dish dish :dishList){
                     if (dish.getStatus()==StatusConstant.DISABLE){
                         throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                     }
                 }
             }
        }

        // 修改套餐状态
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }


    /**
     * 批量删除套餐
     * @param ids
     */
    public void delete(Long[] ids) {
        for (Long id : ids) {
            Setmeal setmealbyId = setmealMapper.getById(id);
            if (setmealbyId.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }

        for (Long id : ids) {
            setmealMapper.deleteByIds(id);
            setmealDishMapper.deleteBySetmealIds(id);
        }
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据套餐id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        List<DishItemVO> list = setmealMapper.getDishItemBySetmealId(id);
        return list;
    }

}
